Hi, My name is Johan Rask and I work for Jayway. I am currently in a project where we are using JPA/Hibernate for modeling a computer network topology. We are running into some performance problems as our topology grows and I hope that you can help me out.
Description: We have three different kind of "units" which have vpn tunnels to each other, which is modeled as relationships using a relational database. There is also something called a group and a units can belong to many groups. Basically, in a worse case scenario we can have a Many2Many with all units (even if that never is going to happen we want to support it) with maximum 5000 units. Our problem (as you may have guessed) is that we have performance issues when doing large changes in the topology (for minor changes it works ok), like deletion of large groups. The topology does not have to be that large either... Removing a group with 300 connected units (300x300 relationships) is enough to cause improper response times. Since it is a many2many relationship we have to resolve and remove all relationships before removal of any units and this is what is time consuming. Question: 1. I was hoping that neo could help us speed up things here 2. I would like to use neo for the topology part only. Simply (well.. not that simply perhaps) switch our TopologyRepository (impl today as JpaTopologyRepository) to a NeoTopologyRepository. I know that transactions are supported, but is it possible to use it with a jta transactionmanager since we will end up with two different datasources if we keep the rest of the system in the relational database? We are using spring. I found this, what is the status? http://wiki.neo4j.org/content/Spring_And_Neo 3. Or is it better(or easier?) to simply use Neo for everything? If something is not clear, please get back to me. Best regards /Johan Rask _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
